Definition of SOS
1 : an internationally recognized signal of distress in radio code ‧ ‧ ‧ - - - ‧ ‧ ‧ used especially by ships calling for help
2 : a call or request for help or rescue
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First Known Use of sos
1910
SOS Defined for English Language Learners
SOS
playDefinition of SOS for English Language Learners
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: a signal used by ships and airplanes to call for help
Medical Dictionary
SOS
Medical Definition of SOS
if occasion require; if necessary—used in writing prescriptions
Origin and Etymology of sos
Latin si opus sit
Learn More about sos
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See words that rhyme with SOS Spanish Central: Translation of SOS Nglish: Translation of SOS for Spanish speakers Britannica.com: Encyclopedia article about SOS
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